| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] [adj] [conj] [art] [noun sg] | 1549 |
|
| 2 | it [is] essential [conj] [art] [noun] | 90 |
|
| 3 | it [be] essential [conj] [art] [noun sg] | 71 |
|
| 4 | [pron] [is] essential [conj] [art] [noun sg] | 66 |
|
